.example-form {
    min-width: 150px;
    max-width: 500px;
    width: 100%;
    margin:20px auto;
    border: 1px solid red;
    padding: 10px;
    border-radius: 15px;
    .example-full-width {
        width: 100%;
        }
    button{
        margin-top: 10px;
    }
}